| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
You would measure the amount of current through a circuit with a(n):
voltmeter |
|
ammeter |
|
potentiometer |
|
battery |
Current is the rate of flow of electrons per unit time and is measured in amperes (A). An ammeter is used to measure the electric current in a circuit.
What is the voltage of most household electrical systems in the United States?
110V |
|
60Hz |
|
220V |
|
60V |
Most households use electricity with a voltage of 110V.
A capacitor to an electronic circuit is like a _______________ to a house?
driveway |
|
safe |
|
gate |
|
storage shed |
Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.
A diode to an electronic circuit is like a _______________ to a city?
traffic light |
|
parking lot |
|
one-way street |
|
highway |
A diode allows current to pass easily in one direction and blocks current in the other direction.
Resistance is measured in:
ohms |
|
amperes |
|
coulombs |
|
volts |
Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.